Photon statistics from coupled quantum dots

B D Gerardot, S Strauf, M J A de Dood, A M Bychkov, A Badolato, K Hennessy, E L Hu, D Bouwmeester, P M Petroff

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Abstract

We present an optical study of two closely stacked self-assembled InAs/GaAs quantum dots. The energy spectrum and correlations between photons subsequently emitted from a single pair provide not only clear evidence of coupling between the quantum dots but also insight into the coupling mechanism. Our results are in agreement with recent theories predicting that tunneling is largely suppressed between nonidentical quantum dots and that the interaction is instead dominated by dipole-dipole coupling and phonon-assisted energy transfer processes.

Original languageEnglish
Article number137403
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume95
Issue number13
DOIs
Publication statusPublished - 23 Sep 2005

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